6847778641 has 16 divisors (see below), whose sum is σ = 7498440000. Its totient is φ = 6201861120.

The previous prime is 6847778633. The next prime is 6847778669. The reversal of 6847778641 is 1468777486.

It is a cyclic number.

It is not a de Polignac number, because 6847778641 - 2³ = 6847778633 is a prime.

It is a super-2 number, since 2×6847778641² = 93784144632271613762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6847778941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5481985 + ... + 5483233.

It is an arithmetic number, because the mean of its divisors is an integer number (468652500).

Almost surely, 2^6847778641 is an apocalyptic number.

It is an amenable number.

6847778641 is a deficient number, since it is larger than the sum of its proper divisors (650661359).

6847778641 is a wasteful number, since it uses less digits than its factorization.

6847778641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its digits is 12644352, while the sum is 58.

The square root of 6847778641 is about 82751.3059776098. The cubic root of 6847778641 is about 1898.9632978792.

The spelling of 6847778641 in words is "six billion, eight hundred forty-seven million, seven hundred seventy-eight thousand, six hundred forty-one".